SELinux defines process types (domains) for each process running on the system

You can see the context of a process using the -Z option to psbP

Policy governs the access confined processes have to files. SELinux postfix_pipe policy is very flexible allowing users to setup their postfix_pipe processes in as secure a method as possible.

The following process types are defined for postfix_pipe:

postfix_pipe_t

Note: semanage permissive -a postfix_pipe_t can be used to make the process type postfix_pipe_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

SELinux policy is customizable based on least access required. postfix_pipe policy is extremely flexible and has several booleans that allow you to manipulate the policy and run postfix_pipe with the tightest access possible.

If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd server, you must turn on the authlogin_nsswitch_use_ldap boolean. Disabled by default.

setsebool -P authlogin_nsswitch_use_ldap 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.

setsebool -P kerberos_enabled 1

If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Disabled by default.

The SELinux process type postfix_pipe_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions.

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to lsbP

Policy governs the access confined processes have to these files. SELinux postfix_pipe policy is very flexible allowing users to setup their postfix_pipe processes in as secure a method as possible.

STANDARD FILE CONTEXT

SELinux defines the file context types for the postfix_pipe, if you wanted to store files with these types in a diffent paths, you need to execute the semanage command to sepecify alternate labeling and then use restorecon to put the labels on disk.

- Set files with the postfix_pipe_exec_t type, if you want to transition an executable to the postfix_pipe_t domain.

postfix_pipe_tmp_t

- Set files with the postfix_pipe_tmp_t type, if you want to store postfix pipe temporary files in the /tmp directories.

Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.